GB610988A - Water softening - Google Patents
Water softeningInfo
- Publication number
- GB610988A GB610988A GB1199246A GB1199246A GB610988A GB 610988 A GB610988 A GB 610988A GB 1199246 A GB1199246 A GB 1199246A GB 1199246 A GB1199246 A GB 1199246A GB 610988 A GB610988 A GB 610988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- precipitate
- sodium
- carbonate
- per
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A process for softening water comprises treatment of the water with lime and/or sodium carbonate or caustic soda to precipitate calcium carbonate and/or magnesium hydroxide therefrom, coagulation of the precipitate by adding soluble silica, and, if desired, sodium aluminate or aluminium sulphate, and thereafter separating the precipitate from the water. The soluble silica is preferably a sodium silicate solution which has been nearly neutralised by addition of sulphuric acid or chlorine, or by converting the caustic alkalinity to carbonate by treatment with carbon dioxide or sodium bicarbonate. The silica solution may contain 0.1 to 3.0 per cent Si O2, and 1 mole Na2O per 10 to 50 moles of Si O2. The amount added is between 2 and 50, (preferably between 5 and 20), parts by weight of Si O2 per million parts of water. Four examples of the process are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1199246A GB610988A (en) | 1946-04-18 | 1946-04-18 | Water softening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1199246A GB610988A (en) | 1946-04-18 | 1946-04-18 | Water softening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB610988A true GB610988A (en) | 1948-10-22 |
Family
ID=9996442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1199246A Expired GB610988A (en) | 1946-04-18 | 1946-04-18 | Water softening |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB610988A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779246A1 (en) * | 1995-12-11 | 1997-06-18 | Torggler Chimica SpA | Precipitating agent for treating effluents |
| AU2011202718B2 (en) * | 2010-06-23 | 2014-08-21 | Jin, Lei | Method for the production of high quality drinking water |
-
1946
- 1946-04-18 GB GB1199246A patent/GB610988A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779246A1 (en) * | 1995-12-11 | 1997-06-18 | Torggler Chimica SpA | Precipitating agent for treating effluents |
| AU2011202718B2 (en) * | 2010-06-23 | 2014-08-21 | Jin, Lei | Method for the production of high quality drinking water |
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